Determining the power spectral density of the waviness of unidirectional glass fibres in polymer composites

A pilot study has been completed into the accurate measurement of 3D fibre waviness in high packing fraction, unidirectional, glass fibre reinforced polymer epoxy. It has been shown that the confocal laser scanning microscope (CLSM) can determine fibre waviness amplitudes, A < =40 mu m and simult...

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Bibliographic Details
Published in:Applied composite materials 1995, Vol.2 (4), p.233-243
Main Authors: Clarke, A. R., Archenhold, G., Davidson, N. C., Slaughter, W. S., Fleck, N. A.
Format: Article
Language:English
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Summary:A pilot study has been completed into the accurate measurement of 3D fibre waviness in high packing fraction, unidirectional, glass fibre reinforced polymer epoxy. It has been shown that the confocal laser scanning microscope (CLSM) can determine fibre waviness amplitudes, A < =40 mu m and simultaneously fibre wavelengths, lambda < =4 mm. Knowing the fibre-centre coordinates in 3D with sub-micron precision, the fibre waviness may be characterized in terms of the power spectral densities S sub u and S sub w orthogonal to the fibre direction (taken to be in the y direction) and also in terms of the power spectral densities of fibre slopes, S sub u' and S sub w' . In future studies, these characterization parameters will enable models linking random fibre waviness to compressive strength to be evaluated.
ISSN:0929-189X
1573-4897
DOI:10.1007/BF00567194